People carry too much debt and even if the debt was forgiven or paid off, incomes don't match affordability. 

However, keep in mind that tying your primary home to an investment carries inherent risks, especially if the flip doesn't go as planned.

While the home needs to be paid for prior to delivery in many cases, the transport companies carry the insurance from the factory to the site. 

You can also use a Modular which carries less rules when it comes to financing. 

Do the homework on a DSCR option as part of your original analysis.Thats the other thing--yes you may carry more in costs, but your risk profile on an A class hood is much lower. 

I'm not terrible afraid of being 100% leveraged but carrying the total DS on the HELOC and mortgage is making it tough.

Even if you believe you can stomach the monthly payments, paying $20K a year to carry a piece of land based on the information you shared is not recommended.

New unit: 4-unit multi family in which 3 units (with existing tenants that will carry over from seller) will remain investment; I will move into (currently empty) 4th unit AND USE as primary residence with primary mortgage.

@Irina Badal The best way to protect your rental investment is to carry adequate insurance. 

Quote from @Carrie Young: Quote from @Sam Wilson: Basically- As investors, we're hosed.